<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html">
	<meta charset="utf-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
	<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
	<title></title>
</head>
<body erke-hide>
</body>
<script>
/**
 * @param {number} n
 * @return {number}
 */
var arrangeCoins = function(n) {
    var i=1;
    while(n-i>=0){
    	n-=i;
    	i++;
    };
    console.log(i-1);
    return i-1;
};
var res=new arrangeCoins(8);
</script>
</html>